The HTC HD7 and HTC HD7S have the exact same 122 x 68 x 11.2 mm dimension and weight of 162 grams. Unlike other manufacturers that tweak their newer iterations, HTC believes that if it is not broken, then there is no need to fix it.
That is why the key difference lies solely in their respective screens; while the HTC HD7 and HTC HD7S both have a 4.3-inch, 480 x 800 pixel screen, the former’s standard LCD display was considered to be inferior when it first debuted via T-Mobile. Rivals AT&T came up with their own version that came with a Super LCD that blew it out of the water.
Both devices run on Windows Phone 7, though expect updates to the newer Windows Phone 7.5 Mango to roll in once Microsoft feels like it, for what is promised to be an entirely new experience altogether.